REVENUES FROM CONTRACTS WITH CUSTOMERS - Schedule of Total Contract Acquisition Costs (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Total contract acquisition costs	$ 44.6	$ 42.2
Other current assets
Disaggregation of Revenue [Line Items]
Total contract acquisition costs	11.9	11.1
Other assets
Disaggregation of Revenue [Line Items]
Total contract acquisition costs	$ 32.7	$ 31.1

Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 340
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123353750&loc=SL49131252-203054

Name:	us-gaap_CapitalizedContractCostNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant